A chronology of the PY608E–PC sediment core (Lake Pumoyum Co, southern Tibetan Plateau) based on radiocarbon dating of total organic carbon

2013 ◽  
Vol 294 ◽  
pp. 520-523 ◽  
Author(s):  
Takahiro Watanabe ◽  
Toshio Nakamura ◽  
Tetsuya Matsunaka ◽  
Fumiko Watanabe Nara ◽  
Liping Zhu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Sediment Core ◽  
Radiocarbon Dating ◽  
Southern Tibetan Plateau ◽  
Pumoyum Co

scholarly journals Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses

2021 ◽  
Vol 18 (16) ◽  
pp. 4791-4816
Author(s):  
Stuart A. Vyse ◽  
Ulrike Herzschuh ◽  
Gregor Pfalz ◽  
Lyudmila A. Pestryakova ◽  
Bernhard Diekmann ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Sediment Core ◽  
Boreal Lakes ◽  
Carbon Accumulation ◽  
Carbon Budgets ◽  
Accumulation Rates ◽  
Glacial Lakes ◽  
Organic Carbon Pool ◽  
Arctic Siberia

Abstract. Lakes act as important sinks for inorganic and organic sediment components. However, investigations of sedimentary carbon budgets within glacial lakes are currently absent from Arctic Siberia. The aim of this paper is to provide the first reconstruction of accumulation rates, sediment and carbon budgets from a lacustrine sediment core from Lake Rauchuagytgyn, Chukotka (Arctic Siberia). We combined multiple sediment biogeochemical and sedimentological parameters from a radiocarbon-dated 6.5 m sediment core with lake basin hydroacoustic data to derive sediment stratigraphy, sediment volumes and infill budgets. Our results distinguished three principal sediment and carbon accumulation regimes that could be identified across all measured environmental proxies including early Marine Isotope Stage 2 (MIS2) (ca. 29–23.4 ka cal BP), mid-MIS2–early MIS1 (ca. 23.4–11.69 ka cal BP) and the Holocene (ca. 11.69–present). Estimated organic carbon accumulation rates (OCARs) were higher within Holocene sediments (average 3.53 g OC m−2 a−1) than Pleistocene sediments (average 1.08 g OC m−2 a−1) and are similar to those calculated for boreal lakes from Quebec and Finland and Lake Baikal but significantly lower than Siberian thermokarst lakes and Alberta glacial lakes. Using a bootstrapping approach, we estimated the total organic carbon pool to be 0.26 ± 0.02 Mt and a total sediment pool of 25.7 ± 1.71 Mt within a hydroacoustically derived sediment volume of ca. 32 990 557 m3. The total organic carbon pool is substantially smaller than Alaskan yedoma, thermokarst lake sediments and Alberta glacial lakes but shares similarities with Finnish boreal lakes. Temporal variability in sediment and carbon accumulation dynamics at Lake Rauchuagytgyn is controlled predominantly by palaeoclimate variation that regulates lake ice-cover dynamics and catchment glacial, fluvial and permafrost processes through time. These processes, in turn, affect catchment and within-lake primary productivity as well as catchment soil development. Spatial differences compared to other lake systems at a trans-regional scale likely relate to the high-latitude, mountainous location of Lake Rauchuagytgyn.

Water depth related ostracod distribution in Lake Pumoyum Co, southern Tibetan Plateau

2013 ◽  
Vol 313-314 ◽  
pp. 47-55 ◽  
Author(s):  
Ping Peng ◽  
Liping Zhu ◽  
Peter Frenzel ◽  
Claudia Wrozyna ◽  
Jianting Ju
Keyword(s):  
Tibetan Plateau ◽  
Water Depth ◽  
Southern Tibetan Plateau ◽  
Pumoyum Co

Distribution and mineralization of organic carbon and nitrogen in forest soils of the southern Tibetan Plateau

CATENA ◽  
2017 ◽  
Vol 156 ◽  
pp. 298-304 ◽  
Author(s):  
Xiaorong Wei ◽  
Xiang Wang ◽  
Tiane Ma ◽  
Linqi Huang ◽  
Qiong Pu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Organic Carbon ◽  
Forest Soils ◽  
Carbon And Nitrogen ◽  
Southern Tibetan Plateau

scholarly journals Editorial: Organic carbon pools in permafrost regions on the Qinghai–Xizang (Tibetan) Plateau

2015 ◽  
Vol 9 (2) ◽  
pp. 479-486 ◽  
Author(s):  
C. Mu ◽  
T. Zhang ◽  
Q. Wu ◽  
X. Peng ◽  
B. Cao ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Carbon Storage ◽  
Carbon Pools ◽  
Permafrost Region ◽  
Arctic Regions ◽  
Deep Layers ◽  
Organic Carbon Storage ◽  
Permafrost Regions

Abstract. The current Northern Circumpolar Soil Carbon Database did not include organic carbon storage in permafrost regions on the Qinghai–Xizang (Tibetan) Plateau (QXP). In this study, we reported a new estimation of soil organic carbon (SOC) pools in the permafrost regions on the QXP up to 25 m depth using a total of 190 soil profiles. The SOC pools were estimated to be 17.3 ± 5.3 Pg for the 0–1 m depth, 10.6 ± 2.7 Pg for the 1–2 m depth, 5.1 ± 1.4 Pg for the 2–3 m depth and 127.2 ± 37.3 Pg for the layer of 3–25 m depth. The percentage of SOC storage in deep layers (3–25 m) on the QXP (80%) was higher than that (39%) in the yedoma and thermokarst deposits in arctic regions. In total, permafrost regions on the QXP contain approximately 160 ± 87 Pg SOC, of which approximately 132 ± 77 Pg (83%) stores in perennially frozen soils and deposits. Total organic carbon pools in permafrost regions on the QXP was approximately 8.7% of that in northern circumpolar permafrost region. The present study demonstrates that the total organic carbon storage is about 1832 Pg in permafrost regions on northern hemisphere.

scholarly journals A New 14C Data Set of the PY608W-PC Sediment Core from Lake Pumoyum Co (Southeastern Tibetan Plateau) Over the Last 19 kyr

Radiocarbon ◽  
2010 ◽  
Vol 52 (3) ◽  
pp. 1435-1442 ◽  
Author(s):  
Takahiro Watanabe ◽  
Tetsuya Matsunaka ◽  
Toshio Nakamura ◽  
Mitsugu Nishimura ◽  
Yasuhiro Izutsu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Sediment Core ◽  
Environmental Changes ◽  
Plant Residue ◽  
Plant Residues ◽  
Silty Clay ◽  
Data Set ◽  
Large Plant ◽  
Southeastern Tibetan Plateau ◽  
Pumoyum Co

A new continuous sediment core (PY608W-PC; 3.8 m length) for reconstruction of climatic and environmental changes in the southeastern Tibetan Plateau was taken from the eastern part of Lake Pumoyum Co in August 2006. Sediment layers of the lower part of PY608W-PC (380–300 cm depth) were composed mainly of relatively large plant residues (up to ∼3 cm in length) with an admixture of fine sand and sandy silt. The large plant residues disappeared at ∼300–290 cm depth in core PY608W-PC and were replaced by silt-silty clay. The large plant residues from the lower part of PY608W-PC could be aquatic, because the plant residues were extremely enriched in 13C (up to –3.0‰, −5.6 ± 2.3‰ on average). On the other hand, the plant residue concentrates (PRC fractions) from the upper part of the core (290–0 cm in depth) could be terrestrial C3 plants (δ13C = –21.8 ± 1.7‰ on average). Radiocarbon dating was performed on the large plant residues and PRC fractions from the PY608W-PC sediment core, which represented the chronology from ∼19,000 cal BP to present.

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